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Click on image for the lowdown. 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Mar 2005 Posts: 684 Shop Shark | | Shop Shark Joined: Mar 2005 Posts: 684 | It was very common in the 40's and 50's to modify the stock exhaust manifold by welding a plate inside to divide the manifold the plate usually had a 1/2 hole to equalize one side to the other
A hole was drilled in to the bottom of the manifold toward the rear of the engine to accept a short piece of pipe with a flange on it for the second exhaust pipe. I had a couple of stovebolts in the 50's with split manifolds. They sounded wonderful. The California Highway Patrol ticketed me more then once for excessive noise. | | |
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